Estimating drift of directional sonobuoys from acoustic bearings
A maximum likelihood method is presented for estimating drift direction and speed of a directional sonobuoy given the deployment location and a time series of acoustic bearings to a sound source at known position. The viability of this method is demonstrated by applying it to two real-world scenario...
| Published in: | The Journal of the Acoustical Society of America |
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| Main Authors: | , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Acoustical Society of America
2018
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| Subjects: | |
| Online Access: | https://doi.org/10.1121/1.5020621 http://www.ncbi.nlm.nih.gov/pubmed/29390794 http://ecite.utas.edu.au/131875 |
| Summary: | A maximum likelihood method is presented for estimating drift direction and speed of a directional sonobuoy given the deployment location and a time series of acoustic bearings to a sound source at known position. The viability of this method is demonstrated by applying it to two real-world scenarios: (1) during a calibration trial where buoys were independently tracked via satellite, and (2) by applying the technique to sonobuoy recordings of a vocalising Antarctic blue whale that was simultaneously tracked by photogrammetric methods. In both test cases, correcting for sonobuoy drift substantially increased the accuracy of acoustic locations. |
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